Business Combination (Acquisition Of OpenSpirit Corporation) (Details) (OpenSpirit Corporation [Member], USD $)	0 Months Ended	3 Months Ended
	Sep. 22, 2010	Aug. 31, 2011	Feb. 28, 2011
Increase (decrease) in goodwill			$ (200,000)
Increase (decrease) in goodwill as a result of the adjustment of deferred income tax assets		(500,000)
Acquisition related expenses	500,000
Cash	3,479,000
Accounts receivable (approximate contractual value)	1,486,000
Deferred income tax assets (liabilities), net	674,000
Other assets	2,252,000
Identifiable intangible assets	9,400,000
Goodwill	5,300,000
Liabilities	(4,173,000)
Total preliminary purchase price	18,418,000
Intangible assets subject to amortization	7,700,000
Weighted average amortization period (in years)	4.7
Goodwill acquired deductible for income tax purposes	0
Existing Technology [Member]
Intangible assets subject to amortization	3,900,000
Weighted average amortization period (in years)	4.0
Customer Base [Member]
Intangible assets subject to amortization	700,000
Weighted average amortization period (in years)	5.0
Trademarks [Member]
Intangible assets subject to amortization	400,000
Weighted average amortization period (in years)	5.0
In-Process Research and Development [Member]
Intangible assets not subject to amortization	1,700,000
Core Technology [Member]
Intangible assets subject to amortization	1,200,000
Weighted average amortization period (in years)	5.0
Maintenance Agreements [Member]
Intangible assets subject to amortization	$ 1,500,000
Weighted average amortization period (in years)	6.0